#!/bin/bash
OLDFORCPATH='PATH_TO_OLD_FORCING_DATA_FOLDER'
NEWFORCPATH='PATH_TO_NEW_FORCING_DATA_FOLDER'
for i in `ls $OLDFORCPATH`; do
echo ${i##*/}
ncks -d west_east,1069,1225 -d south_north,2093,2329 ${OLDFORCPATH}/${i} ${NEWFORCPATH}/${i##*/}
done